i tried them with my friends tynan, todd, doug, and a few others about a year ago. tynan wrote an article about the experience in his blog here: Tynan » Miracle Berries
i saw it on tara recently as well and was reminded of the experience. they really do work and it's totally crazy! i really enjoyed rhubarb, it tasted sort of like an apple, very sweet. after eating a bunch of different fruits and trying things, it was too much - super sweet and i felt like i had just eaten loads of candy.